Introduction About Low-Temperature Black Chrome Plating Process

DALIAN, China - Jan. 19, 2025 - PRLog -- Process Flow:

Surface treatment:

First, the metal substrate is surface treated to remove dirt, oxides and other impurities. Common methods include pickling, electrolytic cleaning and mechanical polishing.

Chemical chromium plating:

After the surface treatment is completed, the metal parts are immersed in an electrolyte containing copper chromate and copper sulfate. By applying an electric current, the copper ions on the metal surface are reduced to metallic chromium, forming a uniform black chromium film.

Low-temperature oxidation:

Under vacuum conditions, chromium atoms are deposited on the surface of the substrate to form a black chromium oxide film. The working temperature of low-temperature oxidation is generally below 70°C, and high pressure is not required.

Post-treatment:

It includes steps such as cleaning, polishing, grinding and painting to increase the gloss and corrosion resistance of the black chrome plating.

Technical Features:

Corrosion resistance:

Low-temperature black chrome plating has good corrosion resistance and is suitable for surface treatment of screws, slides, splines, etc. in highly corrosive environments.

Wear resistance: Black chrome plating has high hardness and wear resistance, which can effectively extend the service life of metal parts.

Aesthetics:

Low-temperature black chrome plating process can provide a beautiful black appearance and enhance the beauty of metal objects.

Environmentally friendly:

Compared with traditional chrome plating, low-temperature black chrome plating process is carried out at a lower temperature, reducing energy consumption and environmental pollution.

Application Areas:

Low-temperature black chrome plating process is widely used in automotive, aviation, electronics and other fields, especially in fields with high aesthetic requirements and high corrosion resistance requirements.
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